All of us suffer from degenerative changes but these may be mitigated by maintaining correct posture, muscle strength and flexibility. Bending, twisting , lifting and sitting can all damage connective tissues and joints.
In our early years we still cause damage but our initial health and quickness of healing enable rapid recovery from injury.
By our middle age the spraining of elastic tissues accumulates and predisposes us to further, more significant, injuries. The intervertebral structures become more unstable.
In later years the spine demonstrates more aches and stiffness as the elasticity diminishes and the ligaments dry-out. Again, posture, diet, mobility and exercise help the body with it’s innate healing abilities.